Seeni, Nish and Marlon, Thanks for the replies...
With the aPPT and aBT, the dial-a-power tab is disabled when in ETSI, so looking at the figures below, I'm 5db (or 25%) down before I start so getting the Total products (as recommended by my supplier) for a link of 3km here in the UK wasn't a good choice! With the aPPO can anyone recommend a suitable antenna to ensure I get 5.5Mbps? Would a aPPO and 9db MobileMark corner reflector at both ends be up to it? The MM antenna have a 75deg horiz b/w so would an antenna with a narrower beam width do the job? There are some power lines between the two sites but apart from that it is CLOS. By the way, the tool to calculate the wireless link sets any Total product to a 13db gain antenna - not taking into account us poor souls in the ETSI region :-( -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Seeni Mohamed Sent: 24 August 2003 17:01 To: [EMAIL PROTECTED] Subject: RE: [smartBridges] RSSI and LQ Hi Andy Watkins, As per ETSI standard(UK) the maximum EIRP power is about 20dbm which is equal to 100mW (Effective Isotropic Radiated Power - Power transmitted from the antenna). For the 3 KM distance, you will be able to get about 1Mbps speed rate (aPPT and aBT using 9db antenna internally) and this is subject to the noise, interference and environmental etc... The LQ values are fluctuating means that there should be some interference or noise in the wireless signal. Please try one by one channel to get better non overlapping frequency. Or use any wireless network tool(sniffer or airopeek) to find out the better non interference channel. The maximum output power calculated as follows: Device produces output power is about 11 dbm and antenna gain is about 9db = 20dbm(100mW) Fade margin calculated as = 5 (assuming loss due to environment like moisture, rain etc.) Below values are approximately as estimated values and this may varies due to noise, interference or if the fade margin increases. At 1 to 1.5 km distance = 11, 5.5, 2 and 1 (Mbps) 2 km distance = 5.5, 2, and 1 (Mbps) 2.5 Km distance = 2, 1 (Mbps) 3 Km distance = 1 (Mbps) Please use the following tool to calculate the wireless link. http://www.smartbridges.com/showcase/link.php Thank you Seeni, SB support -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Andrew Watkins Sent: Sunday, August 24, 2003 5:35 PM To: '[EMAIL PROTECTED]' Subject: [smartBridges] RSSI and LQ I have been running some tests at ranges between .5km and 3km At .5km the RSSI stays consistent at 100% and LQ is 98%. At 3km the RSSI stays consistent at 40% but LQ fluctuates between 0% and 70%. I am using the following: aPPOTotal ----> aBOTotal aPPOTotal ----> aPPO c/w 9db MobileMark corner reflector As I am in the UK, the internal antenna on the Totals is 9db Any comments on why the LQ is so erratic? Thanks Andy Watkins The PART-15.ORG smartBridges Discussion List To Join: mailto:[EMAIL PROTECTED] (in the body type subscribe smartBridges <yournickname> To Remove: mailto:[EMAIL PROTECTED] (in the body type unsubscribe smartBridges) Archives: http://archives.part-15.org The PART-15.ORG smartBridges Discussion List To Join: mailto:[EMAIL PROTECTED] (in the body type subscribe smartBridges <yournickname> To Remove: mailto:[EMAIL PROTECTED] (in the body type unsubscribe smartBridges) Archives: http://archives.part-15.org The PART-15.ORG smartBridges Discussion List To Join: mailto:[EMAIL PROTECTED] (in the body type subscribe smartBridges <yournickname> To Remove: mailto:[EMAIL PROTECTED] (in the body type unsubscribe smartBridges) Archives: http://archives.part-15.org
